Generation of spatial atmospheric turbulence field in aircraft motion simulation based on refined similarity hypothesis  

作　　者：GUO Hao CHEN JingJing QU QiuLin LIU PeiQing 

机构地区：[1]Institute of Fluid Mechanics, Beihang University, and Key Laboratory of Fluid Mechanics (Beihang University) of Ministry of Education, Beijing 100191, China

出　　处：《Science China(Technological Sciences)》2011年第1期244-250,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.10902007);the National Basic Research Program of China ("973" Program) (Grant No.2009CB724001)

摘　　要：It is necessary to build turbulence model to study the response of aircraft to atmospheric turbulence for high resolution earth observation. The conventional method is on the basis of Dryden’s model with the assumption that individual patches are Gaussian. In this paper,based on Kraichnan’s refined similarity idea,a new 1D atmospheric turbulence model is set up by introducing the energy transfer rate as an intermittency disturbance to a Gaussian process. Our results show that the turbulent fields generated by our new method exhibit an anomalous scaling described by the She-Leveque (SL) formula,which is now well accepted for homogenous and isotropic turbulence.

关 键 词：aircraft motion simulation atmospheric turbulence ref＇med similarity hypothesis energy transfer rate 

分 类 号：O151.21[理学—数学] TN241[理学—基础数学]